1. An optical toy consisting of a cylinder with mirrors and colored shapes inside that create shifting symmetrical patterns when the end is rotated.
2. A complex set of events or circumstances.
3. From early 19th century, Greek kalos, "beautiful" + eidos, "form"; + scope, "see".

microscope

1. An optical instrument that uses a lens, or a combination of lenses, to produce magnified images of small objects, especially of objects too small to be seen by the unaided eye.
2. An instrument; such as, an electron microscope, that uses electronic or other processes to magnify objects.
3. A device that uses a lens or system of lenses to produce a greatly magnified image of an object.

An optical microscope uses transmitted or reflected light to obtain the image. An electron microscope uses a beam of electrons and a system of electron-focusing lenses to obtain images.

Misericordia non causam, sed fortunam spectat.

Translation: Compassion takes care of sufferings, it does not ask for their cause.